JP2010035380A - Shape of slot insulator of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily insert slot insulators made of a resin insulation material into a slot from both ends of a multilayer iron core and to ensure a creepage distance for insulation between a field winding and the multilayer iron core inside the slot. <P>SOLUTION: When inserting slot insulators made of a resin insulation material into a slot from both ends of a multilayer iron core, slot insulators whose portions to be joined inside the slot have a projecting shape and a recessed shape, respectively, are used, and they are twisted while being inserted into the slot. The portions to be joined in the slot are made easily overlapped to ensure a creepage distance for insulation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In order to provide electrical insulation between the motor armature core and the field winding in the slot before applying the field winding of the motor armature core or stator core in the laminated core of the motor, the slot from both ends of the laminated core When a slot insulator formed of a resin insulating material is inserted into the slot insulator, the slot insulator is related to making it easy to enter a laminated core slot.

  In order to provide electrical insulation between the motor armature core and the field winding in the slot before applying the field winding of the motor armature core or stator core in the laminated core of the motor, the slot from both ends of the laminated core When a slot insulator formed of a resin insulating material is inserted into the slot insulator, a remarkable difference in work efficiency occurs depending on whether or not the slot insulator has a shape that can easily enter the slot.

  When inserting a slot insulator molded from a resin insulation material into the slot from both ends of the laminated core, there is actually no interest in whether the slot insulator has a shape that can easily enter the slot. there were. In particular, when the number of slots increases and the thickness of slot insulators molded from resin insulation materials is required to be reduced, the stability of the shape will be lost, and sink marks, which are the characteristics of resin materials, will occur, leading to poor tip shape. Although it is stable, there is a demand for easier insertion, but this is a reality.

The past slot insulation shapes for which patent applications have been filed are exemplified below as patent documents, but attention has been paid only to the insulation performance.
JP2004-194413 JP-A-11-299156 JP 11-266557 A

  As an improvement measure, when a slot insulator formed of a resin insulating material is inserted into the slot from both ends of the laminated iron core, attention is paid to the shape of the portion where the slot insulator is joined in the slot. We also focused on facilitating work by giving a twist during insertion.

  A problem to be solved by the present invention is to easily insert a slot insulator formed of a resin insulating material into a slot from both ends of a laminated core.

  In the present invention, when a slot insulator formed of a resin insulating material is inserted into the slot from both ends of the laminated iron core, the shape of the portion where the slot insulator is joined in the slot is changed to the shape of both ends of the protruding portion and the lead-in portion. It is to solve the problem by holding it and giving a twist at the time of insertion.

The slot insulator of the present invention has a shape of a portion where the slot insulator is joined in the slot and has a shape of both ends of the protruding portion and the retracted portion, and the protruding portion is pressed against the slot end surface of the laminated core, By giving a twist to the starting point, the insulator shape is stable even when the tip shape becomes unstable due to sink marks or the like, making it easy to insert into the laminated core.
The reason why the slot insulator of the present invention has both the protruding portion and the retracting portion in the shape of the portion to be joined in the slot is that there is an effect that the parts can be shared even when inserted from the left or right side. .
The slot insulator of the present invention is set in the laminated core slot with protrusions on both the left and right sides, and a slot having a width equivalent to the thickness of the slot insulator is formed in the vicinity of the symmetrical line of the laminated core slot shape. By overlapping the insulators in the slots, the creepage distance between the field windings can be reliably ensured.

The present invention will be described with reference to the drawings. When the slot insulator presses the protrusions of the slot insulator against the both end faces of the core stack slot and twists the slot end face that was pressed when inserted into the starting point, the tip shape becomes unstable due to sink marks, etc. Even in the case of insulation, the shape of the insulator is stable, making it easy to insert into the laminated core. In addition, when the motor to be used is a DC brush motor or the like, the insulation with the output shaft is also used, and covering the part of the output shaft with a slot insulator serves as a reference for insertion and further facilitates the insertion effect. The
Even if the shape of the protruding portion of the slot insulator is approximately square or triangular, the degree of ease of insertion does not change.

  FIG. 3 is an isometric view showing an embodiment implementing the present invention. Reference numeral 1 denotes a slot insulator of the present invention. Reference numeral 2 denotes a laminated iron core having a slot. 2 is a slot insulator in which a laminated core with a slot has a motor output shaft of 3 at the center, and the other part is the same as 1 and reversed.

This embodiment shows the case of an armature of a DC brush motor. A part of the output shaft is covered with a slot insulator to double the insulation with the output shaft. That is the basis for insertion and can be easily inserted to the entrance of the laminated core slot. When inserting into a slot, only the projection part of one end of a slot insulator is put in a slot, and it is further pressed so that it may twist in the same direction as the end surface of a projection part.

Conventionally, in the method in which the slot insulator inserts the slot insulator from both end faces of the core laminated slot and performs field winding, when the slot insulator is inserted from both end faces, the pressing also abuts or some insulation Space was supposed to come out. For motors driven at low voltage, it is not a problem to ensure creepage distance. However, motor windings driven at high voltage cannot secure clearance, and as slot insulation, there are core stack slots and both end faces. Was produced by coating with green compact.

In view of this, the slot insulator was cut with a width of the thickness of the insulator substantially on the left-right symmetry line of each slot shape. Therefore, when the slot insulator is inserted from both end faces, both end faces of the slot insulator are abutted so that the insulator can overlap. With the overlap, the specified insulation creepage distance can be secured.

  The embodiment shows the case where a field wound armature such as a DC brush motor rotates, but the present invention is also applicable to a motor fixed by a field winding such as an induction motor or a stepping motor. Although the same configuration as shown in FIG. 3 is used, a cored bar jig is used for the inner diameter portion of the stator, and the insertion reference is provided so that the projecting portion of the slot insulator is pressed against the inner wall surface of the slot to give a rotational twist. By inserting it, it is possible to secure the creeping distance of the electrical insulation inside the slot by inserting it while overlapping the slot insulator from both left and right sides while overlapping.

The example of the implementation shape of the slot insulator which implemented this invention is shown. The example of the implementation shape which put the notch part on the object line in the slot insulator is shown. An embodiment in which a slot insulator is inserted into a laminated iron core using an adder motor will be described.

Explanation of symbols

1 Slot insulator 2 Laminated iron core
3 Motor output shaft 4 Protrusion part of slot insulator 5 Notch part of slot insulator 6 Notch part on left-right symmetric line of slot insulator

Claims (2)

  To electrically insulate the motor core slot from the field winding, insert a slot insulator molded from resin insulation material into the slot from both ends of the laminated core before applying the field winding. The portion of the slot insulator showing the shape of the line object, and one end of the leading end shape joined to each other is one end with a protruding portion, and the other is one end of a lead-in portion having substantially the same shape at the symmetrical position of the protruding portion An electric motor that uses a slot insulator, which is characterized by its shape. To electrically insulate the motor core slot from the field winding, insert a slot insulator molded from resin insulation material into the slot from both ends of the laminated core before applying the field winding. The portion of the slot insulator showing the shape of the line object, and one end of the leading end shape joined to each other is one end with a protruding portion, and the other is one end of a lead-in portion having substantially the same shape at the symmetrical position of the protruding portion An electric motor using a slot insulator, characterized by having a shape having a shape, and further by making a cut with a width of the thickness of the insulator on a substantially symmetrical line of the slot shape.